From Longman Dictionary of Contemporary EnglishRelated topics: Naturepenumbrape‧num‧bra /pəˈnʌmbrə/ noun [countable]technicalDNHEM an area of slightdarknessExamples from the Corpuspenumbra• In other words, the First Amendment has a penumbra where privacy is protected from governmentalintrusion.• She kept hitting my forehead, and penumbrareplacedmyopia, and my arms fell away, no longer offering interference.• Thus, beyond the specifically theological reasons for unionism, there is a broaderpenumbra of social concerns.• The right of associationcontained in the penumbra of the First Amendment is one, as we have seen.• The area round it was hidden in the penumbra.Originpenumbra(1600-1700)Modern LatinLatinpaene"almost" + umbra"shadow"